Valve silencer



May 4 1926.

A. F. BORSC-HEL VALVE SILENCER Filed March 22. 1924 W J 0O r i b 07 H A TTOR NE YS Patented M y 1 JUNIIT .f n' 'noliscnnr oir Surname, Nn 'w rent. I

v'nnvn To all whom a may amm- Be it known that I, ,A Horseman,

.a citizen of the United States, and .a res1- dent ofBufialo, in-the count of Erie and- State of New York, have 'ma I e' certam new and useful Improvements in Valve S lencers,

of which theiollowing is a specification;

My presentinvention relatesgenerally to valves of internal combustion moto pets or cross arms whereby either-enclosed usual cam shaft, my object being thepro vision of means adaptable to bothtappets' and'cross arms for the purpose of silencing-j the valves and preventing the-usual noises.

brought about by enga ement of thes ejnor mally spaced apart va ve actuating parts,

In the accompanying drawing which il lustrates my, present invention and a part of this-specification, I Figure 1 is a vertical sectional view showing the practical application of my invention in connection with an enclosed valve,

forms my improved silencer applied to the tap- Pet,

Figure 4 is a side viewof an overhe a sli htly modified form of'my invention appli thereto, Figure 5 is a top lan view thereof, and 85 therethroughb a Referrin now tovFigures 'l, 2and 3 wherein I ave, for thepurpo'ses of lllustration, shown my invention in connectionv with the tappet 10 of an enclosed type valve 11, it is known that with respect to the lgwer end ofdthef stfim 12 of sugin'vatlzes teu ren o tecorrespon g pet is i sually slightly spaced to provide clearance, allowing for the e ansion' of the metaL In this construction-t e. upper poly, tion of thetaet 10 is usuallyprovided with a'threade an adjusting screw whose up the forms the'valve stem engaging'sur ace of the tappet and whose admstment thus controls the" clearance between the tappet and the valve stem. This adjusting screw is usually lockedby a nut threaded thereonto bear. II the upper end of the ta'ppeh and 10 more articularl' to the push rodsja'n, imp-f I I P y I I I This shell 13 has angaxial bore16--and}is'; or overhead valves are actuated from t f I I 1 opening, 17 forming a vent :181 it's -imain' bore 16 'receivinT slidable Figure 3 is a top plan view of Figure a Figure 6 is a centra vertical sectiontakenwith the lower end of the valve "ateirflfl 1y through its has re 13 for the race tionzof .26 whose innerv endscommunicatewitht e bore- 16 intermed ateftheendsof the shell against.

-28 of an ov erheadflvalve arrangement conno My invention proposes a silencer which as appliedtq valves of the above t pe includes a cylindrical shell 13, externa lythreaded to screw. into, the bore '10 of the tappet 10, having a reduced portion at one endvand' havin at its opposite end 'an. enlarged polygonal ead 14m. facilitate adjustment] thereof in the: tap'p et bore, a lock nut 15' being employed thereon to lockthe shell in K ad usted position within the .tappet' bore.

oil 1 and at" vits headedend] with a lcounter refv a re ationa stem- 19 rovid'ed wah'aheadQQ I beyond and nornia I y spaced from-the hfid 140 th h utm v I ."Aroundthestemltl-adjacent to-"the'head 20, a bushing 21 is disposed,this-.bushingbeing movable in the counterbore" 18 of the' shell and being utilized with or without it -fiber.or other washer 22 aroundthe' inner Q surface ofthe head 20. The shellbore 1 62 2 Figure'2 is an enlarged detail side-view partly in elevation and partly in section 01 --the latter is thus tensioned and maintained n its, outerposition except, when the tappetismoved upwardly to unseat the valve, an

The

the shell.13 provides .for the adjustmentofi the parts so that the head 20 is, in contact at all times, relative movement between the head 20 of the and the head 14: of the shell compensating for expansion. of the I parts in use. I have shownthe 'shelli13; as provided with adpin 24fitting 'transverse; '14, and. through slotted. 25 of the stem 19" and bushing 21 openings I I -fwhich hus. holds the stemagainst rotation,

supports the parts inithe,-a$embled,positlon, and prevents the sprin' 23 from-fore the stem entirely out of, t e;- shellb efore t is. inserted in the effective position; illustrated in Figure 1. I have also sho'wn the' shell 13 as provided: with in'clined 'oilopenin and whose outer 'endsopen into oil ,groovee. 27in'thefloute'r face-of the head 14. a My inventionasapplied the rocker arm:

I permissible ',movement between the head 20 of the stem 19 and thehead 14 of templates an externally threaded cylindrical shell 13 illustrated in Figures 4, and 6 vwhich is adapted to be screwed through one is spaced from the adjacent end of the shellv f with or without an interposed fiber or other been loosened. 'tion is obviously the same, however, as that washer 22. At its other end the stem has bearing through a reduced 0 enin'g 1'2 of the shell, the end of the shel adjacent to opening 17 being transversely slotted as at 29 so as to form aguide for the reception of a pin 24 which extends through the stem 19 and thus movably holds the stem in connection with the shell 13 and also provides for the reception of a screw driver or likev implements-for adjusting the shell 13 in the rocker'arm 28 after the lock nut l5 has The result of this construcdescribedwith respect to Figures 1, and 3, and it is equally obvious that my invention according to both constructions may be applied with ease and facility in actual operative connection with those parts of valve actuating connections where clearance must ordinarily be left in view of the ex which will eliminate the usual noises, known as valve taps and that it will obviate necessity for the fine; careful adjustments ordinarily required. I j 1 f Iclaim; A valve silencer including an externall threaded shell adapted for adjustable 0S1? tioning within a'tappet, rocker arm an the like,.said shell having a'borefor the major portion of its length and areduced opening through, one end, a stem havin a movable bearing'within the bore and aving 'a head at its outer end beyond one end of the shell, a spring within the bore of the shell for moving the stem in an-outward direction,- and a pin through a portion of the stem and through an adjacent portion of the shell to limit spring actuated movement of the stem said shell having inclined oil 'feed openings extending therein from a point adjacent to-its upper end and 0 eningv at their, lower ends into the said ore intermediate the ends'of the latter.

ALFRED F. BORSCHEL. 

